Seat cushion



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Jul 4, 1944.

Patented July 4, 1944 UNITED STATES PATENT OFFICE 3 Claims. (Cl. 155-480) This invention relates to seat cushion springs.

The cushion is particularly adapted for use in vehicles used in warfare, particularly gas warfare.

It is the object of the invention to provide an upholstering cover for the seat cushion which can be quickly detached so that it can be thrown in a tank for removing the gas from the material. To this end the seat cushion is provided with a plurality of return bend hooks on the ends of the cross rods. The skirt of the upholstering cover is provided with openings adapted to fit over these hooks and a draw string by which the turned over edge of the skirt may be drawn taut and the draw string tied to hold the skirt in place. By

simply untying the knot the skirt may be easily removed from the hooks and the entire upholstering cover, including the padding, may be disengaged from the seat and spring and thrown into a suitable tank to have the gas removed from the padding.

Referring to the drawing:

Fig. 1 is a fragmentary perspective of a seat cushion equipped with the removable upholstering cover.

Fig. 2 is a section taken on the line 22 of Fig. 1.

Fig. 3 is a fragmentary perspective of the skirt of the upholstering cover showing the draw string.

Fig. 4 is a fragmentary perspective showing a modified form.

Fig. 5 is a section taken on the line 55 of Fig. 4.

The seat cushion spring is made up of the usual hour glass springs I. These are tied together by the channel strips 2 in the customary way. The hour glass springs I are clipped to the inner frame wire 3 by means of metal clips 4. An outer wire frame 5 extends around the inner frame but spaced therefrom. Cross rods 6 or reinforcing members are spot welded at the intersections 1. These cross rods or reinforcing members have their ends turned back in return bend hooks 8 which are spot welded to the outer wire frame 5 at 9 and the inner wire frame t at Hi. This heavy wire or rod forms a grille for the bottom of the seat cushion. The hooks welded to the innerand outer wire frames at three Places form a strong reinforcing border strip all around the cushion.

The upholstering cover includes the padding II, the trim material I2, which in turn includes the skirt l3, and the hemmed edge M in which is threaded a draw string I5. Along the hem are cut away portions I6. These leave the draw string 24 exposed here and form a recess which may be hooked over the hooked ends 8 of the cross rods 6, as shown in Fig. 1. The draw string may then be drawn taut and tied with a knot I 1. This removably places the upholstering cover on the seat bottom spring. By untying the knot ll it may be quickly removed for de-gassing.

A modified form is shown in Figs. 4 and 5. Here the cross rods are replaced by a cross strip of metal I8 which has a hook I!) struck out of the substance of the metal. In this case there is only border frame 20. The draw string is hooked over the struck out hook 19 in the same way as already described in connection with the cross rods.

What I claim is:

1. In a seat spring cushion, the combination of a plurality of coiled supporting springs and a seat bottom therefor, comprising a border frame and a plurality of rods arranged in crossed relation and spanning said border frame both longitudinally and transversely and having their ends return bend to form hooks welded to the border frame and an upholstering cover having cut away portions along a hem with a draw string therein hooked over said hooks at the cut away portions.

2. In a seat spring cushion, the combination of a plurality of coiled supporting springs and a seat bottom therefor, comprising a border frame and a plurality of rods arranged in crossed relation and spanning said border frame both longitudinally and transversely and having their ends return bend to form hooks welded to the border frame and an upholstering cover having the skirt provided with a hemmed edge having cut away portions adapted to fit over said hooks on the crossed wire rods and a draw string threaded into the hemmed edge and arranged to engage over the hooks and said draw string pulled taut and the ends tied together to hold the u'pholstering cover edge over the bottom of the seat spring structure.

3. In a seat cushion structure, the combination of a plurality of coiled supporting springs secured together and a reinforced bottom therefor, comprising a pair of spaced wire border frames, one enclosed in the other, a plurality of crossed reinforcing wires having return bend hooks spot welded to the two border frames and a removable upholstering cover provided with a skirt having a hemmed edge and a draw string and cut away portions arranged to be hooked over the hooked ends of the cross wires and the draw string pulled taut and the ends tied to gather the edge of the upholstering skirt together and draw it over the bottom of the seat spring structure.

JOHN M. CAUGHEY. 

